DR Jeanne, your friend's approach to music is strange. I feel there's more interest in musical wallpaper than interest in the music, from your comments. She has no serious interest in any composer, so I'm going to throw out some wild suggestions.
Vocally, I think she'd be more interest in crossover than, say, arias, so here are some ideas of this I personally think are wonderful:
Pavarotti's two album with Henry Mancini
Frederioca vn Stade singing Rodgers & Ha